Compressor-pump.



T. E. MURRAY & A. W. H. GRIEPE. COMPRESSOR PUMP.

APPLICATION FILED NOV. 8, 1912.

Patented July 2i, 1914..

2 SHBETSSHEET 1.

T. E. MURRAY & A. W. H. GRIEPE.

COMPRESSOR PUMP.

Y APPLICATIONTILED NOV. 8, 1912.

Patented July 21, 1914 '2 SHEETS-SHEET 2.

1 I i i J j u; m @Mtmfiif v snares PANT @lEFilQE. I

anon/ms nfMURnAY Ann AUsUs-r w. H. Ga e on new YORK, n. Y.; SAID earner;

'ASSIGNOR T S AID MURRAY.

' ooiarnnsson'rrmvrr.

I Specification or Letters Patent. 1 v i P t nte July 21, 1914,

Application filed November 8, 1912. serial No. 730,13

' and AUGUST W. H. GRIEPE, citizens of the United States, residing at New York, inthecounty of New York and State of New York, have invented a certain new and useful Improvement in Compressor-Pumps, of which the following is a specification.

The invention is a double-acting compressor pump, more especially intended for use in vapor compression refrigerating machines, It comprises a Cylinder, a piston therein, a. sleeve valve inclosing the piston, having inlet and outlet ports cooperating with inlet 'and outlet ports in thecylind'er, and means for opposing a predetermined elastic resistance to' the movement of the valve, these parts being so arranged and timed that during the forward-stroke of the piston the sleeve valve is not moved against the resistance-of the spring until the pres- .sure of the fluid compressed within it by the piston overcomes the opposing elastic re sistance. Then the" valve sufficiently moved to open an outlet for the compressed fluid, and'an inlet through which a new charge is drawn into the sleeve valve behind the piston, which new chargeon the return stroke of the piston becomes in like manner.

compressed.

In the accompanying draw1ngs-F1gures '1 and 2 are horizontal sections of our ,COID? pressor pump, respectively showing the piston at the left hand end, and at the right hand end of its stroke Fig. 3 is a transverse vertical section on the line m, m of Fig. 2. Fig. 4 is a top view of the sleevevalve, parts being broken away to show the openving'-,in the piston for the insertion. of the 40" driving shaft and crank, and alsothclocation of the'right hand end ofv said piston when the crank'arm is in the position shown. Similar numbers of reference indicate like parts.

1 is the cylinder, provided with brackets 2, which may be secured upon any suitable supports.

On one side of the cylinder is 'a tubular projection 3, internally threaded for --the connection of the pipe leading from the source of fluid to be compressed. In the cylinder wall and communicating with tubular projection 3 is a passage l. The inlet ports 5, 6 communicate with said passage. On the opposite side of cylinder 1 is a similar passage 8 communicating with the out- E. MURRAY disposed 0 let ports 9, 10' and with internally threaded tubular projection 7, to which the delivery pipe may be attached.

A The ends of the cylinder and of the passages 4c and 8 are closed by'the heads 11, 12, secured by bolts. 13. In head'll are tubes 14, each tube containing a helical spring 15.

In head 12 are tubes 16, each tube contain ing a helical spring 17. The resiliency of springs 17 is to be the samev as that of springs 15. Thetubesli, 16 are rigidly secured in' the heads in any suitable way.

Within the. cylinder 1 a sleeve valve 18.

"which atits ends is threaded to receive heads 19, 20. Said heads are recessed to receive the outer ends othelical springs 15 and 17. In valve 18 are inlet ports 21, 22, and outlet ports 23, 24. Also in the upper side of said valve isan elongated slot .25, Fig. l.

The hollow cylindrical piston 26,-which' is placed within the sleeve valve 18,,is everywhere closed except at the top, where thereis' an elongated slot 28, Fig. 4. On the upper'sidefioi. the cylinder l-is an internally threaded rejection 27, Fig. 3,

-w hich' receives a stir ng-box 29, the lower portion of said box extending down through in piston 26, and entering said piston.

Pass1ngthrough striding-box 2 9 is a dr1ving shaft 30 which enters piston 26 and at the sl'ot'25 in the valve 18, and the slot 28 its lower end carries a crank arm 31 which is pivoted to one endof a pit-man 32, the

end of the piston. Ateaeh end oi the sleeve other end of which pitman is pivoted to a "lug 33.011 the inner side of piston 26. A

valve 18 are two pairsof similar packing rings. 35, the members of each pair being jopposite sides of the outlet ports 23, 24. V Y I It is'to he noted. that the piston 26 is en' tirely inclosed within the sleeve valve 18, and reciprocates in said yalve. The function' of said valve is to control the inlet and outlet ports, as will now be described.

By any suitable means, the shaft 30 is rotated, and through the crank mechanism causes the piston 26 to reciprocate in the sleeve valve 18. Assuming thatin Fig. 1 a charge of gas has been drawn into said valve on the right hand side of the piston through the registering inlet ports6, 22, when the piston starts to the right, the sleeve valve moves with it in the same direction until equilibrium is established between springs posed between the same and the ends of said and 17. This movement will throw the sleeve valve for opposing a predetermined ports 6, 22 and 9, outof register. As the resilient resistance to the movement of said piston continues to move to the right, it sleeve valve by the fluid compressed therein 5 compresses the gas in front of it, and finally by said piston. 1 I

overcomes the elastic resistance of springs 3. A compressor pump, comprising a cyl-. 17., Then the sleeve valve 1-8 moves forward inder, a piston therein, a sleeve valve inclosand brings the outlet ports 10, 24 into regising said piston, having closed ends and, in try, so that'fth'e compressed gas can escape its Wall, outlet and inlet ports cooperating lo fto passage Sand outlet duct 7. At the same with outlet and inlet ports in the wall of Z timefsa-id valve brings the inletports 5, 21 said cylinder, means for reciprocating said v on its left hand or rear side into alinement, piston, and a plurality of springs interposed.

so that a new charge-of-gas is drawn In between each end of said sleeve valve and 10 Fig. 2, the compressed gas has just escaped said cylinder. 15 from the outlet ports 10', 24, and the piston 4. A compressor pump, comprising a cylis about \to. begin its reverse stroke. The inder, a sleeve valve therein, having a longisprings 17 then force the sleeve'valve 18 to tudinal slot and outlet and inlet ports co- I move-to the left and follow the piston 26 'for operating with outlet and inlet ports in the a certain'distance, so closing the outlet ports wall of said cylinder, a hollow piston closed 10, 24: and inlet ports 5, 21. The operation at both ends disposed withinsaid valve and already described is repeated on the left' having aslot registering with said valve hand' jsideof the piston, until the resistance slot, mechanism within said piston for reof springs 15 is overcome, when the outlet ciprocating the same, and a driving shaft @ports' 9, 23 and inlet ports ,6; 22 open, thus for said mechanism entering said piston B5 bringing the parts back to the position of throu h said slots. Fi 5. gcompress'or pump comprising acylf for any c-ause the pressure in the pump inder, aisleeve valve therein, having a longish'ould-rise above that provided for by the tudinal slot and outlet and inlet ports copredetermined resilience of the springs, thev operating with outlet and inlet ports in the seisoleefleetis that the resistance of the springs Wall of said "cylinder a hollow piston closed "is overcome at an earlierpoint in the stroke at both ends sp 4 it said-valve and oiijthe piston, and the outlet port becomes. having a slot registering with said .valve correspondingly opened to relieve the surslot, mechanism within said pistonfor recipplus-pressure. rocating the same, a stufing-box seated in a j ln jassembling the machine, it is ear Wall of said cylinder and entering said pisable" to-"fill'the piston with Vaseline, thus inton through said slots, and a driving shaft '{suringperfectlubrication, of th crank for said reciprocating mechanism received 'i fichanism. The movement of the sleeve in said stalling-box. e5 7 valvc'-".18 is very small, andmay be but a A c mp s pump, c mp i ng a Cy 149 small fraction of anlinch, thus mlnimizing inder, a sleeve valve therein, having a longiwear-. I .tudinal slot and outlet andinlet ports cop, We claim: g operating with outlet and" inlet ports in the l. A compressor pump, comprising yL wall of said cylinder, a hollow pistonjclosed inder, a sleeve valve therein having inlet and t both ends disposed within said valve" and p 45 outlet ports. cooperatin with inlet and outhaving aslot registering" With said valve let ports in said cylinder, a 'piston in said slot, a rotary shaft entering said piston valve, means for reciprocatin aid i t n, through said slots, a crank arm on saidshaft v and means for op osingar predetermined disposedwithin' said piston, and-a p'itman resilient resistance to the movement of said p v ed at its ndssp iv ly to said pis 50 sleeve valve y the fluid compressed therein and ds n m by said piston. v In testimony whereof we have afiixed our 2. A compressor pump, comprising a cylsignatures in presence of two witnesses. inder, a piston therein, a sleeve valve inclos THOMAS E. MURRAY. ing said piston, having inlet and outlet ports AUGU T W- H- E 55 coope atln with inlet and outlet ports in Witnesses: u

said cylin er, means for reciprocating said GERTRUDE T. Ponrnm'f p1ston, and means in said cylinder and interr MAY T, MCGA RRL 

